Clopen set

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If you find our videos helpful you can support us by buying something from amazon. • https://www.amazon.com/?tag=wiki-audi... • Clopen set • In topology, a clopen set (a portmanteau of closed-open set) in a topological space is a set which is both open and closed.That this is possible may seem counter-intuitive, as the common meanings of open and closed are antonyms. • =======Image-Copyright-Info======= • Image is in public domain • Author-Info: David Eppstein • Image Source: https://en.wikipedia.org/wiki/File:Ps... • =======Image-Copyright-Info======== • -Video is targeted to blind users • Attribution: • Article text available under CC-BY-SA • image source in video • •    • Clopen set  

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